Not sure if it's what you're after but a storage solution I have is a Drobo mk2. It's like a RAID enclosure but a lot more simple. I have many many gigabytes of video, either rips from DVDs or downloaded tv. I got the Drobo because I couldn't spare the time for countless DVD burns as backup.
It takes upto 4 sata drives, you choose what size goes in - mix & match if you like - and if there's more than 1 it has redundancy for 1 drive failing. I currently have 3 1TB and 1 500GB drive in there so total storage is actually 2.3TB. I did start with a couple of 500GB and 320 GBs, it's not fussed what goes in!
It has firewire 800 and usb connectivity and these days you can get a droboshare free which adds networking too.
Some consider it an expensive box, i have had no problems and the peace of mind and simplicity are priceless. It saves any hassle/thoughts of raid configs and having to have matching drives.
My friend has a DroboPro which takes 8 drives in one 19" rackmount unit and can do redundancy for 2 drives.... that one really is overkill for most home use!
If you want to be burning DVDs then DVD writers are cheap as chips these days in the unlucky event you wear yours out!
just my late night tuppence worth.... toodles!